"I am a Ukrainian, a Russian, a Pole..." And a Scot, Mateusz Zajac might have added, given that, after the second world war, he emigrated to Inverness and never left. Now his son Matthew Zajac has created this solo docudrama tracing his father's journey. Sometimes the play falls victim to the confusion it depicts, as contradictory accounts are given of Zajac Snr's movements and Europe's borders are rapidly redrawn. But if this monologue takes time to come into focus, it finally reveals the rootlessness of a young man without a country, on a continent at war with itself - and the ripples that his decisions cast.

We meet Mateusz in his tailor's workshop, cheerfully recalling (in a disarming Polish-Scots accent) his arrival in the Highlands. But his narrative is broken by flashbacks to an east European past, as the younger man carouses in then-Polish Galicia. This time-jump structure shepherds us, not always surely, along Zajac's wartime route to a collective farm in Uzbekistan, then on to the Middle East, Egypt, Italy and beyond. By the war's end, Zajac has fought on both the Russian and German sides, and it's hard to see to whom he owes any loyalty - other than himself.

The drama then cedes into documentary, as Matthew inherits the story and shows slides of his recent trip to Poland. It can feel like a live version of the BBC's genealogy show, Who Do You Think You Are? But Matthew has secrets to reveal that re-draw once again, emotionally at least, the map of his father's flight from Poland. Sometimes his narration is too sombre - but elsewhere, the emotional meter is deftly calibrated, with help from Gavin Marwick on the violin. Fluidly directed by Grid Iron's Ben Harrison, this is a resonant meditation on what can become of families when countries shift beneath their feet.